Hello. I don't know how to do this A = { } B = { } Describe A+B and A-B. Thank you.
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Well, these are line segments... Do you know what "+" and "-" mean in this context?
Originally Posted by TheChaz Well, these are line segments... They look like coordinates to me. Edit: I see what you mean. But + and - seem to me to be simple addition and subtraction of real coordinates.
Last edited by alexmahone; Oct 17th 2011 at 10:16 AM.
Originally Posted by alexmahone They look like coordinates to me. Indeed, the elements of A and B are coordinates, but isn't the entire set A (B) a line segment/interval of R^2? Since A and B aren't real numbers... ???
Originally Posted by Lolyta Hello. I don't know how to do this A = { } B = { } Describe A+B and A-B. Thank you. A + B = { } A - B = { }
Originally Posted by TheChaz Indeed, the elements of A and B are coordinates, but isn't the entire set A (B) a line segment/interval of R^2? Since A and B aren't real numbers... ??? Sorry...
Originally Posted by alexmahone A + B = { } A - B = { } Thanks a lot for answering but could you explain how you did it?
Originally Posted by Lolyta Thanks a lot for answering but could you explain how you did it? We cannot help until you define what each of means.
Originally Posted by Plato We cannot help until you define what each of means. Well, A+B ={ }. A-B ={ }.
Originally Posted by Lolyta Hello. I don't know how to do this A = { } B = { } Describe A+B and A-B. So it is coordinate operations. Rewrite the B set to make the answer clearer. A = { } B = Now
Then here's your answer. Originally Posted by alexmahone A + B = { } A - B = { }
Thanks a lot to everyone